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Finding the Fourth Proportional to 207,632.20, 311,448.30 and 205,663.90

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Solution

The fourth proportional to 207,632.20, 311,448.30 and 205,663.90 is: 308,495.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,632.20 : 311,448.30 = 205,663.90 : x
  2. Step 2: Convert to fraction form
    207,632.20/311,448.30 = 205,663.90/x
  3. Step 3: Cross multiply
    207,632.20x = 311,448.30 × 205,663.90
  4. Step 4: Simplify right side
    207,632.20x = 64,053,672,026.37
  5. Step 5: Solve for x
    x = 64,053,672,026.37/207,632.20
  6. Step 6: Final answer
    x = 308,495.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.